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Join Date: Jan 2007
Location: Greenwood SC
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I was wondering if that is about average for a 98 c5. I have a friend who has a 06 GTO he told me that stock c5s are running 12.5s and I thought I was doing pretty good with street tires and only a vararam. Oh and I programmed the fans to come on sooner and took out the traction crap.